chore(deps): bump http-proxy-middleware from 0.19.2 to 2.0.0

Bumps [http-proxy-middleware](https://github.com/chimurai/http-proxy-middleware) from 0.19.2 to 2.0.0.
- [Release notes](https://github.com/chimurai/http-proxy-middleware/releases)
- [Changelog](https://github.com/chimurai/http-proxy-middleware/blob/master/CHANGELOG.md)
- [Commits](https://github.com/chimurai/http-proxy-middleware/compare/v0.19.2...v2.0.0)

---
updated-dependencies:
- dependency-name: http-proxy-middleware
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

plugins/proxy-backend/package.json

@@ -33,7 +33,7 @@
     "@types/express": "^4.17.6",
     "express": "^4.17.1",
     "express-promise-router": "^4.1.0",
-    "http-proxy-middleware": "^0.19.1",
+    "http-proxy-middleware": "^2.0.0",
     "morgan": "^1.10.0",
     "uuid": "^8.0.0",
     "winston": "^3.2.1",